Snap fastener stud



Aug. 1s, 1936. W, l, JONES 2,051,407

SNAP FASTENER STUD Filed May 25, 19,33

Patented Aug. V18, 1936 y UNITED STATES PATENT OFFICE SNAP FASTENER STUDApplication May 25, 1933, Serial No. 672,822

1 Claim.

My invention aims to provide improvements in snap fasteners.

In the drawing which illustrates a preferred embodiment of my invention:Figure 1 is a plan view of my improved snap fastener stud in cooperationwith a particular installation;

Fig. 2is'an enlarged section taken on the line 2 2 of Figure 1, the studmember being shown in elevation and in the act of being pressed intoattaching position;

Fig. 3 is an enlarged section on the line 3 3 of Fig. 1 showing the studcompletely attached;

and

Figui is an under side plan view of the stud.

My improved fastener is particularly, though not exclusively, useful inconnection with an installation wherein it is desirable to securetogether two plate-like portions which may be moved relative to eachother flatwise and also which may have a certain amount of movement awayfrom each other.

The particular fastener illustrated by the drawing is formed from asingle piece of metal and has in the transverse direction. 'I'he ends ofthe base are curled upwardly (Fig. 2) to provide bearing points 2 2 andthat portion of the base between the bearing points is arched lengthwiseto permit yielding of the base I. While the fastener is particularlyuseful in securing two plate-like stud receiving parts of the naturementioned above to form a suiciently secure fastening to constitute apermanent installation, it is capable of disengagement from the studreceiving part by pressing the projections 3 3 toward one anotherdirectly or by appropriate flexure of the base I to effect this end. Thefastener also includes a pair of at, thin projections 3 3 formedintegral o with the base I and extending away from the central portionthereof, as clearly illustrated in Figs. 2 and 3. These projections 3 3are offset relative to each other (Fig-4) so that they may move towardeach other and-pass like the arms of a scissors when being engaged withor disengaged from a cooperating stud-receiving part. Each projection 3is formed directly from the material of the base thereby leaving anaperture 4. From an inspection of the drawing, it'will be noted that oneprojection 3 is taken from thematerial at one side of a line drawntransversely through the base where .the projections join the base l andthe other is taken from the other side of this line without extending tothe periphery of the base. Therefore, the -base vhas a continuous a baseI preferably longer in one direction than' peripheral portion and itisquite resilient thereby permitting the scissors-like action of theprojections 3. The particular arrangement of the projecti s 3 3 is suchthat they connect with the base `at points where. it is not weakened to5 any extent by the fact that the projectionsare cut out of the materialof the base. Each of the projections 3 3 has an outer edge shaped toprovide a stud head 5 and a neck 6.

In the particular'installation which Ihave se- 10 lected forillustration of the use of my improved fastener there are shown two thinplate parts 1 and adapted to be rotated relative to each other. Theseplate parts 1 and 8 are provided with interlocking detent members 9 andI0. The 15 member l is provided with a projection 9 forming one of thedetent members and the part 8 is provided with a recess I0 providing theother detent member. When the detent members 9 and I0 are interengaged,as shown in Fig. 2, the 20 plates l and 8 are held against accidentalrotation. 'I'he plate 'I has an aperture II in alignment with theaperture I2 in the plate 8 and a bushing I3 has its tubular portionpassing through both apertures and aflange I4 resting against the 25outer surface o-f the plate 'I, as best shown in Figs. 2 and 3. The snapfastener member is arranged with the plates and bushing in such a mannerthat the bearing portions 2 2 of the base I rest against the outsideface of the plate 8 and the projections 3 3 extend through the bushingI3 with the shoulders I5 I5 of the head 5 in contact with the flange I4of the bushing I3, as clearly illustrated in Fig. 3. During the.attaching'operation the base I of the fastener stud flexes toward theplate 8, so that the shoulders I5 I5 on the projections 3 3 may pass bythe bushing I3 and engage directly with the flange I4 of the bushing tohold the fastener stud in position, as best illustrated in Fig. 3. Thusthe parts of the installation are held to gether by the stud, betweenthe shoulders I5 I5 and the bearing portions 2 2 of the base I.

The base I is yieldable at all times so that there maybe relativemovement of the plates 'I and 8 toward and away from each other topermit clisengagement of the detent elements 9 and I0. dur-l ing arotary movement of the plates. During the rotary movement the plates land 8 rotate about the shank of the bushing I3, so that the bushingpreferably remains stationary relative to the fastener member.Therefore, since the bushing I3 is interposed between the fastenermember and the plate "I, the shoulders I5 I5 cannot interfere withrotation, nor can they mar the surface of the plate as they would belikely to do if the bushing were not used.

My improved fastener is simple, formed from a single piece of metal, andhas many advantages over any similar type of fastener for use withinstallations like that described. It is relatively easy to manufactureand quite inexpensive, since the amount of material which is necessaryVhas been reduced to a minimum.

While I have illustrated and described a preferred embodiment of myinvention, I do not wish to be limited thereby, because the scope of myinvention is best deilned by the following claim.

I claim:

A fastener ci the class described having an elon-v gated sheet metalbase with a continuous peripheral yieldable portion and provided withspaced bearing .portions and being normally arched lengthwise betweenthe bearing portions. a pair of ilat thin projections formed of metalstamped out of the base except at their roots which join with thecentral portion or the base adjacent one another in virtual edge to edgealignment, said projections, respectively, being formed of metal cut outof the base at opposite sides of the line virtually dened by their rootedges, and said projections standing up from their root edges atsubstantially right angles to the base, said proiec- 10 tions beingoiset relative to each other to permit an edgewise scissors likemovement due only to said peripheral portion -of said base and eachhaving an outer edge shaped and arranged to cooperate with the edge ofthe other to make snap 15 fastening engagement with a cooperatingiastener-receiving part.

WALTER. I. JONES.

